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39 lines
866 B
C
39 lines
866 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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/* After libbb.h, since it needs sys/types.h on some systems */
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#include <sys/utsname.h> /* for uname(2) */
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/* Returns current kernel version encoded as major*65536 + minor*256 + patch,
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* so, for example, to check if the kernel is greater than 2.2.11:
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*
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* if (get_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> }
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*/
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int FAST_FUNC get_linux_version_code(void)
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{
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struct utsname name;
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char *s;
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int i, r;
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if (uname(&name) == -1) {
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bb_perror_msg("can't get system information");
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return 0;
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}
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s = name.release;
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r = 0;
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for (i = 0; i < 3; i++) {
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r = r * 256 + atoi(strtok(s, "."));
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s = NULL;
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}
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return r;
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}
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